I would like to ask for advice about plotting a growth curve model, preferably using SAS, SPSS or Excel. Is that an appropriate question for CrossValidated?
If the question is purely about how to make the plot in some software, but you know which plot you want to make, it is off-topic here, and better asked at https://stackoverflow.com/.
But if the question also is about how to choose a way of plotting, how to choose between different possibilities, then it is a statistical question and on-topic here. Often these two aspects got intermingled, then you have a choice, but if the programming aspect is secondary, it is on-topic here to (and maybe also at the other site).